Epsilon V1.4.2B.zip is a beta file of the Minecraft resource pack Project Epsilon, made for Minecraft 1.13-Snapshot. It was published on August 2, 2018 and is 22 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Project Epsilon resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.
